Brand Model: BT506
Battery Type: Polymer Lithium Battery
Bluetooth version: Bluetooth 5.0
Battery capacity: 3.7v 1600mAh, 7.4wH
Brand Model: BT506 
Battery Type: Polymer Lithium Battery 
Bluetooth Version: Bluetooth 5.0 
Battery Capacity: 3.7v 1600mAh, 7.4wH 
Support Protocol: A2DP, AVRCP, HFP, HSP Charging
Interface: Micro USB, DC5V===2A 
Card Slot: MicroSD Card/TF Card (Maximum Support 32G)
Connection Distance: About 10 meters (Accessible)
Audio Interface: 3.5mm Audio 
Support Call: Yes

Support protocol: A2DP, AVRCP, HFP, HSP
Charging interface: Micro USB, DC5V===2A
Card slot: MicroSD card/TF card (maximum support 32G) Connection distance: about 10 meters (accessible)
Audio interface: 3.5mm audio
Support call: yes